Question

我希望能够支持此查询：

select first_name from 
 employees
where hire_date between x and y;

我创建了以下过程，没有错误。

    CREATE OR REPLACE PROCEDURE pr_show_col_table(
    col      IN VARCHAR2,
    tab      IN VARCHAR2,
    date_col IN VARCHAR2,
    dt2      IN VARCHAR2,
    dt1      IN VARCHAR2)
    IS
--
type typ_ref_cur   IS  ref   CURSOR;
cur typ_ref_cur;
type l_record  IS record (first_name employees.first_name%type);
l_rec l_record;
BEGIN
--
OPEN cur FOR 
  ' Select '|| col || ' from ' || tab || ' where ' || date_col || 
  ' Between TRUNC(:startdt) and TRUNC(:enddt) ' 
  USING dt2, NVL(dt1,dt2+1);
--  
  LOOP
    FETCH cur INTO l_rec;
  EXIT    WHEN cur%notfound;
  dbms_output.put_line('Name is '|| l_rec.first_name);
  END LOOP;
CLOSE cur;
--
EXCEPTION
WHEN OTHERS THEN
  dbms_output.put_line
  ('Error at line '||dbms_utility.format_error_backtrace|| chr(10)
    || 'Error Message '||dbms_utility.format_error_STACK);
END pr_show_col_table;

/

但是当我尝试运行此程序时：

BEGIN
  pr_show_col_table (
   'first_name', 
   'employees', 
   'hire_date', 
   to_Date('30-DEC-1995','DD-MON-YYYY'),
   TO_DATE('01-JAN-1995','DD-MON-YYYY'));
END;

我收到以下错误：

ORA-06512行的错误：“HR.PR_SHOW_COL_TABLE”，第13行

错误消息ORA-06502：PL / SQL：数字或值错误：字符到数字转换错误

我该如何解决这个问题？

Answer 1

原因是您将日期值传递给varchar参数。将dt2，dt1参数的数据类型设置为class TestItem < ActiveRecord::Base belongs_to :test attr_accessor :main_text, :position, :kind def wrapped_object klass = kind.constantize klass.new(_needed_params) end end class TrueFalseQuestion # DO NOT INHERIT attr_accessor :kind, :position def print ... end end而不是DATE

显示包含特定范围内的日期列的行的给定列信息

1 个答案: